GMC M60 1975: SERVICE BRAKES, AIR:ANTILOCK:CONTROL UNIT/MODULE

General Information

NHTSA Campaign ID Number: 78V148000

Make Model Year
GMC M60 1975
Date Owners Notified Date Received by ODI Date Added to Database
1978-07-17 1978-06-26 1979-10-12

Production Dates: 1975-03-01 - 1976-05-01

Manufacturers Involved: General Motors, LLC

Component: SERVICE BRAKES, AIR:ANTILOCK:CONTROL UNIT/MODULE

Potential Number Of Units Affected: 1343

Report Initiator: ODI ODI Report

Summary

SOME ANTI-LOCK CONTROLLERS CONTAIN ELECTRONIC COMPONENTS WHICH WERE NOT MADE TO SPECIFICATIONS. IN THE EVENT THESE CONTROLLERS DEVELOP A FAILURE OF ANOTHER INTERNAL ELECTRIC COMPONENT, THE COMBINATION OF DEFECTS MAY CAUSE THE ANTI-LOCK VALVE SOLENOID "A COILED CURRENT CONDUCTING WIRE" TO BE CONTINUOUSLY ENERGIZED, PREVENTING APPLICATION OF THE BRAKES ON THE AXLE INVOLVED. HOWEVER, THE ANTI-LOCK BRAKING SYSTEM PERFORMANCE ON THE REMAINDER OF THE VEHICLE IS NOT AFFECTED AND THE DRIVER WARNING LIGHT IS NOT ACTUATED.

Remedy

THE DEALER WILL INSPECT AND, IF NECESSARY, INSTALL NEW CONTROLLERS WITHOUT CHARGE TO OWNER.

Notes

VEHICLE DESCRIPTION: HEAVY TRUCKS EQUIPPED WITH AIR BRAKES.SYSTEM: SERVICE BRAKES; ANTI-LOCK.CONSEQUENCES OF DEFECT: VEHICLE STOPPING DISTANCES WLL BE INCREASED AND AVEHICLE ACCIDENT COULD OCCUR WITHOUT PRIOR WARNING.